title: Stable superhydrophobic surface of hierarchical carbon nanotubes on Si micropillar arrays.
abstract: It is of great importance to construct a stable superhydrophobic surface with low sliding angle (SA) for various applications. We used hydrophobic carbon nanotubes (CNTs) to construct the superhydrophobic hierarchical architecture of CNTs on silicon micropillar array (CNTs/Si-μp), which have a large contact angle of 153° to 155° and an ultralow SA of 3° to 5°. Small water droplets with a volume larger than 0.3 μL can slide on the CNTs/Si-μp with a tilted angle of approximately 5°. The CNTs growing on planar Si wafer lose their superhydrophobic properties after exposing to tiny water droplets. However, the CNTs/Si-μp still show superhydrophobic properties even after wetting using tiny water droplets. The CNTs/Si-μp still have a hierarchical structure after wetting, resulting in a stable superhydrophobic surface.
authors.affiliation: Key Lab for Advanced Materials Processing Technology of Education Ministry, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, People's Republic of China. jqwei@tsinghua.edu.cn.
authors.forename: Shaoqing
authors.initials: S
authors.lastname: He
authors.forename: Jinquan
authors.initials: J
authors.lastname: Wei
authors.forename: Haifan
authors.initials: H
authors.lastname: Wang
authors.forename: Deshun
authors.initials: D
authors.lastname: Sun
authors.forename: Zhaohui
authors.initials: Z
authors.lastname: Yao
authors.forename: Chengsong
authors.initials: C
authors.lastname: Fu
authors.forename: Ruiqiao
authors.initials: R
authors.lastname: Xu
authors.forename: Yi
authors.initials: Y
authors.lastname: Jia
authors.forename: Hongwei
authors.initials: H
authors.lastname: Zhu
authors.forename: Kunlin
authors.initials: K
authors.lastname: Wang
authors.forename: Dehai
authors.initials: D
authors.lastname: Wu